56615691 has 8 divisors (see below), whose sum is σ = 82350144. Its totient is φ = 34312520.

The previous prime is 56615681. The next prime is 56615717. The reversal of 56615691 is 19651665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56615691 - 2¹⁰ = 56614667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56615681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857781 + ... + 857846.

It is an arithmetic number, because the mean of its divisors is an integer number (10293768).

Almost surely, 2^56615691 is an apocalyptic number.

56615691 is a deficient number, since it is larger than the sum of its proper divisors (25734453).

56615691 is a wasteful number, since it uses less digits than its factorization.

56615691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715641.

The product of its digits is 48600, while the sum is 39.

The square root of 56615691 is about 7524.3399046029. The cubic root of 56615691 is about 383.9832417274.

The spelling of 56615691 in words is "fifty-six million, six hundred fifteen thousand, six hundred ninety-one".